EFX 885, 835, 825
Service Manual 20039-166
Page 89
©2011 Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law
No hand held reading - Normal chest strap reading
4.
Access the diagnostic program (Procedure 5.1). Advance to the heart rate display portion of the diagnostic
program. Verify that a hand held signal is not being accepted by firmly grasping both the right and left hand
held contacts on the handlebars. Cover as much of the top and bottom contact surface area with your
hands as possible (without moving your hands), you should receive a heart rate reading within ten seconds.
5.
If the hand held signal is now being accepted, something in the near vicinity is radiating RF (radio
frequency) energy that is being received by the chest strap portion of the heart rate PCA.
6.
If a hand held signal still not being accepted, skip to step 8.
7.
Replace the heart rate PCA with a 300812-101 (or higher) heart rate PCA. 300812-101 and higher versions
of heart rate PCA are less susceptible to radiated RF energy.
8.
Access the diagnostic program (Procedure 5.1). Advance to the heart rate display portion of the diagnostic
program. Verify that a hand held signal is not being accepted by firmly grasping both the right and left hand
held contacts with the opposite hands, right hand on the left handlebar contacts and left hand on the right
handlebar contacts. Cover as much of the top an bottom contact surface area with your hands as possible,
you should receive a heart rate reading within ten seconds. If a hand held signal is still not being accepted,
skip to step 10.
9.
If a hand held signal was accepted in step 8, the hand held contact wiring is reversed. The harness that
connects to the hand held contacts in the handlebar is segregated into two groups. One group has blue
shrink wrap around it and the other group has black shrink wrap around it. The blue group must go to the
right hand contacts and the black group must go to the left hand contacts. If necessary, rewire the hand
held contacts as described above and test as described in step 4.
10.
If the wiring is correct, refer to Diagram 5.12.1 for the following measurements. With an ohmmeter measure
between the lower right contact pin on the J1 connector and the lower right hand held heart rate contact on
the handlebar. The reading should be 1
or less. Measure between the upper right contact pin on the J1
connector and the upper right hand held heart rate contact on the handlebar. The reading should be 1
or
less. Measure between the upper left contact pin on the J1 connector and the upper left hand held heart
rate contact on the handlebar. The reading should be 1
or less. Measure between the lower left contact
pin on the J1 connector and the lower left hand held heart rate contact on the handlebar. The reading
should be 1
or less. If any of the above readings are greater than 1
, replace the heart rate PCA to
handlebar wire harness.
Summary of Contents for EFX 825
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